CVE-2026-31808

MEDIUM EPSS 24.2%
Published Mar 10, 20263mo ago · Modified Mar 18, 20263mo ago
5.3 CVSS 3.1
Medium
Find Similar
Published Mar 10, 2026 3mo ago
Last Modified Mar 18, 2026 3mo ago

Description

file-type detects the file type of a file, stream, or data. Prior to 21.3.1, a denial of service vulnerability exists in the ASF (WMV/WMA) file type detection parser. When parsing a crafted input where an ASF sub-header has a size field of zero, the parser enters an infinite loop. The payload value becomes negative (-24), causing tokenizer.ignore(payload) to move the read position backwards, so the same sub-header is read repeatedly forever. Any application that uses file-type to detect the type of untrusted/attacker-controlled input is affected. An attacker can stall the Node.js event loop with a 55-byte payload. Fixed in version 21.3.1.

CVSS Details

Base Score
5.3
Exploitability
3.9
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability Low

Threat Intelligence

EPSS Exploit Probability
24.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-835

Affected Products 1

VendorProductVersionRange
sindresorhusfile-type*≥13.0.0  –  <21.3.1

References 2

  • github.com https://github.com/sindresorhus/file-type/commit/319abf871b50ba2fa221b4a7050059f1ae096f4f
    Patch
  • github.com https://github.com/sindresorhus/file-type/security/advisories/GHSA-5v7r-6r5c-r473
    MitigationPatchVendor Advisory

Remediation

  • github.com https://github.com/sindresorhus/file-type/commit/319abf871b50ba2fa221b4a7050059f1ae096f4f
    Patch
  • github.com https://github.com/sindresorhus/file-type/security/advisories/GHSA-5v7r-6r5c-r473
    MitigationPatchVendor Advisory